Atma-Sphere Class D… Amazing

I understand that measurements can affect sound.....However, it is just one tool and a very flawed one. You cannot measure resistors, inductors, wire, solder, op amps, connecotrs, damping, shielding, directionality of fuses, fuses, circuit board material, resonances, etc. in any meaningful way......You have to listen.

if you are using a big inductive resistor and then went to a small non inductive resistor....you might measure something. However, all nichrome surface mount one sixteenth watt reistor brands ALL sound different from each other. They are all made from practically the same material....are the same size, etc.....Why wuold this be? Who cares?!.....I A/Bed four different brands and one brand was clearly more transparent then the others......still using this resistor today.....but I parallel them for better sound and use a larger version as that sounds better too........so many things affect the sound that cannot be measured......this is HOW it is.

My goal is to inform people so they can improve their stereo or their lives....that is what I do. The mods I suggested are completely universal. If you did this to a $400 Topping or a $120,000 Gryphon amp the results would be the same....except you would hear more difference with the more transparent piece of gear.

OK, quick logic check here; If "everything has a sound" (nonsense IMO, but...) then the "mods" you suggest will *alter* (key word here, not Improve)  the sound of any of these amps. Again, doubtful IMO, but let's say you're correct. I know nothing about Atma-Sphere or his products, but from reading what he's written here, he clearly designs his amplifiers to *sound* right/good/pick an adjective to him, and hopefully, by extension to his customers. Nelson Pass is famous for designing amps with specific, and different, sound characteristics, i.e. not "flat" or "straight wire with gain". Again, he designs his amplifiers to *sound* as he intends them to, as does Atma-Sphere. So your "mods", to the extent they make any difference, only improve the sound *relative to your opinion* - nothing remotely universal about it - because every mod you do moves the sound away from the intent of the designer. You are setting yourself up as the universal arbiter of differences in *preference*, while also impugning the competence of every product designer out there. Good luck getting anyone to buy into that.

And for anyone dropping $120K on an amplifier that they don't think sounds right, or has a sonic signature that needs "fixed", well, I'd say meds are more in order than tweaks.

The trick here is understanding that the measurements, if the correct ones are actually made, affect what you hear in a very direct way.

Measurements are what they are-data-they don’t affect what anyone "hears" as they are read, not listened to, unless you are referring to biases induced from the reading of measurements. Testing has indicated correlations between certain distortion spectra and "averaged" or group perceptions but there has been no perfect correlation established between measurements and human response on an individual basis because at the end of the day, you just can’t account for taste.

So your "mods", to the extent they make any difference, only improve the sound *relative to your opinion* - nothing remotely universal about it - because every mod you do moves the sound away from the intent of the designer. You are setting yourself up as the universal arbiter of differences in *preference*, while also impugning the competence of every product designer out there. Good luck getting anyone to buy into that.

Bravo!

Tomorrow morning I am going have some fun. Am going to bring these amps and put them into some high end systems at a local Audio Shop in a Minneapolis suburb. Like to hear them drive some really hard loads. And see how they do against some amps 5 times plus the cost. And I want to hear them on big Magnepan and Wilson’s. Just curious…  Should be pretty interesting. Afternoon will have a shootout against Pass Labs XA60.8 amps which I really love. They are 2nd to my MA-1’s in my system. Should be fun to hear if the Atma-Sphere Class D can best them.